Petri dish 90mm

In the meticulous world of microbiology and cell culture, the integrity of your foundational tools directly dictates the reliability of your results. A single compromised culture vessel can invalidate weeks of work, lead to costly contamination, and obscure critical data. This is why the choice of Petri dish is not a trivial expense but a fundamental investment in experimental certainty. The 90 mm Petri dish presented here is engineered specifically for the professional laboratory that demands consistent, reproducible outcomes without the premium price tag, providing a sterile and optically clear environment where your samples can thrive and your observations can be trusted.

The core problem with many generic or poorly manufactured Petri dishes is inconsistency. Variations in wall thickness, surface texture, or residual particulate matter can inhibit microbial growth, create optical distortions that hinder microscopic examination, and introduce uncontrollable variables. Our 90 mm dish addresses this by being precision-molded from virgin, medical-grade polystyrene. This material selection is critical; it ensures exceptional optical clarity for unambiguous colony counting and morphological assessment, while its inherent chemical resistance prevents interaction with a wide range of culture media, stains, and disinfectants, preserving your sample’s true characteristics.

Key features are translated into tangible laboratory advantages through rigorous design and manufacturing control. The dish’s internal dimensions are held to a tight tolerance of ±0.5 mm, ensuring a perfectly uniform culture area of approximately 6360 mm². This uniformity is paramount for standardized zone of inhibition testing in antibiotic sensitivity assays, where precise measurements are legally and scientifically required. The uniform wall thickness of 1.2 mm provides structural rigidity to prevent cracking during handling or incubation, while the slightly concave base design promotes even media distribution and optimal gas exchange for robust aerobic growth. The lid features a precise, molded rim that creates a secure, contamination-resistant seal without vacuum-locking, allowing for easy, one-handed opening and closing—a significant ergonomic benefit during high-throughput workflows.

Practical details are integrated to enhance daily laboratory efficiency and safety. Each dish is individually wrapped in a breathable paper pouch that maintains sterility until the moment of use, eliminating the risk of environmental contamination from bulk storage. The packaging is also clearly marked with the manufacturing lot number and expiration date for full traceability, a mandatory requirement for accredited laboratories. The exterior of both the dish and lid features a subtle, ribbed texture. This is not merely aesthetic; it provides a high-friction surface that prevents dishes from sliding across benchtops when stacked or moved, reducing the risk of spills and breakage. Furthermore, the dishes are designed for stable, space-saving stacking, maximizing valuable incubator and storage shelf space.

The specifications provide a clear blueprint for integration into any standard protocol. The overall diameter is 90 mm ± 0.5 mm, with a height of 17 mm when assembled. The usable volume for agar media is approximately 25 mL, a standard capacity that allows for a sufficient nutrient depth while preventing excessive condensation on the lid. The polystyrene is certified free of DNAase, RNAase, and pyrogens, making it suitable for molecular biology applications. The entire product line undergoes validated sterility assurance via gamma irradiation, achieving a Sterility Assurance Level (SAL) of 10⁻⁶, and is tested for endotoxin levels to ensure it does not interfere with sensitive immunological assays.

The applications for this Petri dish are vast and fundamental across scientific disciplines. In clinical and research microbiology, it serves as the primary vessel for pure culture isolation, enumeration, and biochemical testing. In pharmaceutical quality control, it is the standard platform for microbial limit testing and preservative efficacy tests. Educational institutions rely on its consistency for teaching fundamental aseptic techniques and microbial growth characteristics. Environmental laboratories use it for water and surface monitoring. Its cost-effectiveness makes it ideal for high-volume screening applications, such as in food and beverage production facilities, where reliable, repeatable results are essential for safety and compliance.

Ultimately, this 90 mm Petri dish delivers professional-grade performance at a remarkably accessible price point of KSh 20.00. It eliminates the hidden costs associated with failed experiments—the wasted time, reagents, and consumables that result from using an inferior product. By providing a consistently sterile, dimensionally accurate, and optically superior vessel, it safeguards your samples, streamlines your procedures, and supports the generation of data you can confidently publish or report. You are not purchasing a simple plastic tray; you are securing a foundational component of scientific rigor. We stand behind the quality control of every batch, ensuring that each dish you open meets the exacting standards your work demands. Choose this Petri dish for uncompromised reliability in every culture.